液体窒素温度下におけるSUS304鋼の多軸クリープ変形挙動

概要

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Creep deformation of SUS 304 stainless steel is experimentally investigated at low temperature by applying combined axial and torsional loads to thin-walled tubular specimens. The specimens are cooled by soaking in liquid nitrogen. The strain of specimens is measured by an image processing method. Creep deformation is remarkable in the stress range from 700MPa to 900MPa at low temperature. Creep deformation depends on the loading direction. Compressive creep deformation is much less than the tensile one at the same equivalent stress level. Torsional creep deformation is also much less than the tensile one at the same stress level. From the results of step-up tests, it is found that the stainless steel is hardened by creep deformation and its hardening value is nearly equal to that produced by the same magnitude as plastic strain.
一般社団法人日本機械学会の論文
1996-10-25